Ten years ago this month, everyone’s favorite geeky online store launched. ThinkGeek, which just unmasked a new design of its Website (I love it!), is celebrating its 10th anniversary by giving away a free ThinkGeek T-shirt for every $10 purchase you make. This free T-shirt features “Zombie Timmy noshing on brainz,” according to the ThinkGeek Website. Sounds right down my alley!

Pick up your free tee while supplies last.

And because ThinkGeek loves its customers, it’s holding a sweepstakes full of delightful prizes! The grand-prize winner will get a $1,200 ThinkGeek shopping spree, a batch of homemade cookies from the ThinkGeek staff, a small box of doodads, a ThinkGeek sleeping bag prototype, and you featured on the ThinkGeek homepage for a day! Second- and third-prize winners will also win great stuff. To enter, just fill out the form by August 31, 2009 at 11:59 p.m. Eastern Time.